Question: The dispersion relation for electron in 3-dimensional lattice in tight binding approximation is given by E(k)=E-A[cos (ka)+cosk,a+cosk.a] where 'a' is a lattice constant and

The dispersion relation for electron in 3-dimensional lattice in tight binding approximation

The dispersion relation for electron in 3-dimensional lattice in tight binding approximation is given by E(k)=E-A[cos (ka)+cosk,a+cosk.a] where 'a' is a lattice constant and the value of A is 1 eV. The band width of the band along [111] direction is OleV O 3 eV 6 eV 08 eV

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